JSPM

Computes the cosine similarity between two arrays.

Computes the cosine similarity between two vectors

Segregates values by similarity.

Segregates values by similarity.

Calculate the cosine distance between arrays

Calculates the similarity of 2 string arrays and sorts the seconds one by similarity to first

Get the first fulfilled promise that satisfies the provided testing function

Get the first path that exists on disk of multiple paths

Get the native type of a value.

Array#isArray for older browsers

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

Determines if an object can be used as an array

Tiny queue data structure

User-friendly glob matching

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Minimal async jobs utility library, with streams support

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Run an array of functions in parallel

List of binary file extensions

Create an array of unique values, in order, from the input arrays

Returns true if a value is a plain object, array or function.

Flatten nested arrays

An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Robustly get the byte length of a Typed Array

A simple list of possible Typed Array names.

Is this value a JS SharedArrayBuffer?

extend like a boss

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

Is this value a JS ArrayBuffer?

Robustly get the length of a Typed Array

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

Robustly get the byte offset of a Typed Array

ES spec-compliant shim for ArrayBuffer.prototype.slice

A list of SPDX license identifiers

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Convert a value to an array

Simply swizzle your arguments

Detect whether or not an object is a Typed Array

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

Push an array of items into an array, while being robust against prototype modification

An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.

An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.

Array manipulation, ordering, searching, summarizing, etc.

TypedArray polyfill for old browsers

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Creates a shallow clone of any JavaScript value.

An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.

Remove duplicate values from an array. Fastest ES5 implementation.

Parse postgres array columns

Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.

A static list of the Node.js builtin modules from the latest Node.js version

Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.

a few common utility template tags for ES2015

Sort the keys of an object

Set an array of unique values as the property of an object. Supports setting deeply nested properties using using object-paths/dot notation.

Create an array without duplicates

Create an array by repeating the given value n times.

Recursively flatten an array or arrays.

Visit a method over the items in an object, or map visit over the objects in an array.

Map `visit` over an array of objects.

Utils for working with JavaScript classes and prototype methods.

Iterator abstraction based on ES6 specification

Get a compare function for array to sort

Check if a string matches the name of a Node.js builtin module

Isomorphic, functional type-checking for Javascript

Turn anything into an array

List of text file extensions

Guarantees an array back

An ES5 spec-compliant `Array.prototype.reduce` shim/polyfill/replacement that works as far down as ES3.

No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.

Create an array with values that are present in the first input array but not additional ones

Join paths and globs.

ES2015 `Array#findIndex()` ponyfill

Removes duplicates from a sorted array in place

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

Array methods for ES6 Iterators

Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.

Like an array, but rounder.

Get the longest item in an array.

Loop over each item in an array and call the given function on every element.

Replace or remove multiple items in an array.

Natural Sort algorithm for Javascript - Version 0.7 - Released under MIT license

A simple and composable way to validate data in JavaScript (and TypeScript).

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

Typescript-compatible minimalistic shallow equality check for arrays/objects

Check if two arrays are equal

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Return true if a value is a valid glob pattern or patterns.

Iterate any iterable JS value. Works robustly in all environments, all versions.

Concatenate a readable stream's data into a single array

Microsoft sucks

ES spec-compliant shim for TypedArray.prototype.slice

An ES5 spec-compliant `Array.prototype.map` shim/polyfill/replacement that works as far down as ES3.

List of Markdown file extensions

Find the greatest satisfied semver range from an array of ranges.

An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.

Run an array of functions in series

Isomorphic map-reduce function to flatten an array into the supplied array

An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.

Get the last or last n elements in an array.

Creates an async iterator for a variety of inputs in the browser and node. Supports fetch, node-fetch, and cross-fetch

A ponyfill for the ES 2015 (ES6) `Array.from()`.

Validates if a value is an integer array.

Validates if a value is an array.

Run an array of functions in parallel, but limit the number of tasks executing at the same time

Run promise-returning & async functions in series, each passing its result to the next

Array#filter for older browsers.

Get all but the last element or last n elements of an array.

Fast and powerful array sorting. Sort an array of objects by one or more properties. Any number of nested properties or custom comparison functions may be used.

Faster, node.js focused alternative to JavaScript's native array map.

Faster alternative to javascript's native filter method.

Computes the greatest common divisor (gcd).

Computes the least common multiple (lcm).

make a shallow copy of an object or array

An optionally-asynchronous forEach with an interesting interface.

Treat multiple buffers as one

`Array#forEach()` but it’s possible to define where to move to next

Sort array elements in descending order.

filter in array tree

Sort the keys in an object.

Sort array elements in ascending order.

finds an item in an array matching a predicate function, and returns its index

ES6 Array.find ponyfill. Return the first array element which satisfies a testing function.

`[].map(f)` for older browsers

Sorts any JavaScript array in a predictable way (deep equal arrays are always sorted in the same order)

Make any value an array. No dependencies.

Multidimensional Arrays

A faster Node.js alternative to Array.prototype.slice.call(arguments)

Microsoft sucks

Watch an object or array for changes

Generates an array of consecutive integers starting at 0

Make array iteration easy when using async/await and Promises

`[].reduce()` for old browsers

Check whether a value is "empty".

Find the first element in an array that passes a callback test. Equivalent to underscore.find()

Reuse typed arrays

Safely push each item of an array to a stream

Sort an array on an object property

Test if a value is an array.

Return a function which tests if every element in an array passes a test condition.

A simple and composable way to validate data in JavaScript (and TypeScript).

Test if a value is a Float64Array.

Float32Array.

Return a data type from a string representing the type

Float64Array.

Test if a value is a Uint32Array.

Maximum unsigned 32-bit integer.

Deep-merge the values of one object structure into another

Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER.

Test if a value is a Uint8Array.

Uint8Array.

A tiny, faster alternative to native Array.prototype.every

Test if a value is a Uint16Array.

Packs an array-of-arrays into a single ndarray

Test if a value is a Float32Array.

Initialize an array of arrays to a constant

Uint16Array.

Uint32Array.

Rotate all items in an array

flattens nested vertex data into a typed array

Find [nd-]array min/max values

Convert Buffer to ArrayBuffer

creates a new array with given range

Simple iterator for flat and multi section lists

Rearrange array elements by index array

Normalize array (possibly n-dimensional) to zero mean and unit variance

Move an array item to a different position

List of getter/setter properties for JavaScript types

Deep copy objects and arrays

List of properties for JavaScript objects

The swiss army knife for binary data in JavaScript.

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

List of JavaScript types

Makes easy to convert JSON to CSV

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Returns an array containing the initial elements which both input arrays have in common

Array / Arraylike utilities

Rotate an array by a given number of steps

Computes the dot product between two numeric arrays.

Creates a real Array from almost anything.

Comma delimit an array for human readability, the Oxford comma is optional.

Wrapper for [braces] to enable brace expansion for arrays of patterns.

Compare your item to items in an array and get the closest one.

Chai plugin for JSON Schema v4

Merge two lists, trying to preserve the order of both

Isomorphic, load-anywhere function to sort an array by scalar, deep or computed values in any standard or custom order

Extensible deep value equivalence checking for any data types

A fast implementation of a fisher-yates shuffle that does not mutate the source array.

Get unique values of an array. Really, like deeply unique.

Computes the L2 norm (Euclidean norm) of an array of values.

An ES5 spec-compliant `Array.prototype.every` shim/polyfill/replacement that works as far down as ES3.

Functional tree editing, manipulation & navigation

Recursively iterates over arrays and objects

Return true if the given number is even.

Flatten a nested array.

high-performance, zero-dependency circular reference check for objects (or arrays)

Returns a copy of an object, sorted deeply by its keys, without mangling any arrays inside of it

Give eachr an item to iterate (array, object or map) and an iterator, then in return eachr gives iterator the value and key of each item, and will stop if the iterator returned false.

Adds array support to node-glob, sync and async. Also supports tilde expansion (user home) and resolving to global npm modules.

An RxJS map operator that takes an observable of arrays as input and emits arrays where each element represents emissions from the projected observable.

Module for working with CIDR (v4, v6)

List of common default router IP addresses

Returns true if the given is falsey (according to JavaScript) or matches a 'falsey' keyword.

Sort string index ranges

🔧 Fast, modern, and practical utility library for FP in TypeScript.

A utility function to index arrays by any criteria

Object -> [[key0, value0], [key1, value1]...]

recursive object extending & overriding

Reduce an array to unique values, optionally into a separate array.

Lazily initialized properties for objects

Run an array of functions in series, each passing its results to the next function (waterfall)

Turn an array into a list of comma-separated values, appropriate for use in an English sentence.

Asynchronous iterator function for parallel processing.

Promised First-In-First-Out buffer. Await on push to be told when a value is consumed and await on shift for a value to consume when the buffer is empty.

Join all elements of an array and create a human-readable string

Parse dotenv files for Boolean, Array, and Number variable types, built for CrocodileJS

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Pipe an Array through Node.js streams

Read, write or test a data structure's nested property via a string like 'my.nested.property'. It works through arrays and objects.'

Check if the given value is an Array

Like lodash's _.defaultsDeep, but with array preservation

Fast intersection of multiple arrays

Randomize the order of the elements in a given array.

Async array reduce. Asynchronously applies a function against an accumulator and each element in an array (from left to right, in series) to reduce it to a single value.

Create an error from an array of error messages

Returns an array filled with the specified input

Execute a method out from an object.

An ES spec-compliant `Array.prototype.forEach` shim/polyfill/replacement that works as far down as ES3.

remove items from a javascript array without generating memory garbage

A complete, fully tested data structure library written in TypeScript.

create a new array filled with a value, or zero

Get consecutively unique elements from an array

Creates and makes an array without duplicates. Even with array of objects with a specified matcher.

A parallel, asynchronous implementation of forEach in ES6 with a configurable maximum degree of parallelism.

A data structure that combines a hash and an array for fast dictionary lookup and traversal by complex keys.

Blazing fast, tree-shakeable, type-safe, modern utility library to sort any type of array in less than 1 KB!

Convert Gitignore to Glob patterns

Transform dot-delimited strings to array of strings for Node.js and the browser.

Remembers the highest/lowest values in a data set of any size.

Uppercase first character of each element in arrays of strings.

A function for iterating over objects, arrays, strings and ranges

Group array of objects into lists.

Collection of image extensions

List of video file extensions

Find the intersection of two arrays

Bind data arrays to any type of JS objects